Apple II emulation on 8 bit Atari?

This kinda freaks me out a little but A2Central posted this as a quickie today:

Apple II emulation has come to the 8-bit Atari, thanks to Piotr “Artax” Mejer. Read all about it (originally in Polish) Google translation here, and download it here (7-Zip file). Requires a real or emulated 8-bit Atari with 128KB. Might be fun for all you crossover retro-computists.